How would you answer Why do you feel you would be a good candidate for this position?

Think about the job requirements itself, and describe your characteristics that match with what is required. E.g. if it is a job where you are required to talk to the general public, point out that you are not shy. If you have examples, by all means give them. Think about what you have done in various clubs you've been involved: drama club or debating team helps to prove you aren't shy about speaking in public. Coin or stamp collecting helps to prove you are organized.